Spam Control Considered Harmful
Greg A. Woods
woods at most.weird.com
Fri Oct 31 07:43:37 UTC 1997
[ On Wed, October 29, 1997 at 15:12:46 (-0800), Dalvenjah FoxFire wrote: ]
> Subject: Re: Spam Control Considered Harmful
> The only reason I can think of that would stop this would be if a
> user subscribes to earthlink, but uses a UUnet dialin, that customer's
> software would be set up to use the Earthlink SMTP servers.
This should only present a minor complexity. If the authentication
information can be retrieved from the correct home ISP then there should
be no trouble identifying that ISP and adding the right filter to their
> Keep in mind again I don't yet know much about how this would impact
> router performance..but wouldn't one be able to set up access-lists,
> then, that would allow port-25 connections to a defined list of SMTP
> servers (say, UUnet, MSN, and earthlink SMTP servers), and prohibit
> everything else?
One more filter rule in the existing list for preventing IP spoofing
shouldn't make any significant difference.
> Why aren't they doing this?
Probably because they're not preventing IP spoofing yet either.
Greg A. Woods
+1 416 443-1734 VE3TCP <gwoods at acm.org> <robohack!woods>
Planix, Inc. <woods at planix.com>; Secrets of the Weird <woods at weird.com>
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